How do you get the four gold bricks in front of the dining hall on Lego Harry Potter?

If you have the gold brick detector on it appears to show 4 gold bricks in front of the dining hall but they are really all pieces like lighting candles or breaking suits of armor. The arrows are a bit misleading but they are trying to point to the 4 "house" banners. There is one on either side of the doorway which you may need to hold "x" [on xbox 360] or "square" [for PS3] to target them above. The other two are on either side of the main staircase.